Jaguar XJ (X350). Manual — part 161

-> Yes

GO to Pinpoint Test

G189234t7

.

-> No

Vehicle is OK.

G189234t7 : INSPECT TIRE PRESSURE

1. Check for excessive tire wear or incorrect pressures.

•

Are the tires at the correct pressure and in good condition?

-> Yes

GO to Pinpoint Test

G189234t8

.

-> No

ADJUST the tire pressures or INSTALL new tires if excessively worn. TEST the system for normal

operation.

G189234t8 : CHECK CALIPERS

1. Check the front brake caliper pistons for binding, leaking or sticking. For additional information,

refer to

<<206-03>>

. Check the rear brake caliper pistons for binding, leaking or sticking. For

additional information, refer to

<<206-04>>

.

•

Do the disc brake caliper pistons and pins bind, leak or stick?

-> Yes

INSTALL new brake calipers as necessary. TEST the system for normal operation.

-> No

GO to Pinpoint Test

G189234t9

.

G189234t9 : INSPECT BRAKE DISCS

1. Check the brake discs for excessive damage, thickness variation or runout. For additional

information, refer to General Procedures.

•

Does excessive damage or runout exist?

-> Yes

INSTALL new brake discs and brake pads as necessary. TEST the system for normal operation.

-> No

GO to Pinpoint Test

G189234t10

.

G189234t10 : INSPECT THE FRONT HUB AND WHEEL BEARING ASSEMBLY

1. Check the front hub and wheel bearing assembly. For additional information, refer to

<<204-00>>

.

•

Are the wheel bearings OK?

-> Yes

GO to Pinpoint Test

G189234t11

.

-> No

INSTALL new wheel bearings. For additional information, refer to

<<204-01>>

. TEST the system for

normal operation.

G189234t11 : CHECK SUSPENSION BUSHES AND BALL JOINTS.

1. Check all suspension bushes and ball joints.

•

Are the suspension bushes and ball joints OK?

-> Yes

GO to Pinpoint Test

G189234t12

.

-> No

INSTALL new front suspension bushes and ball joints as required. For additional information, refer to

<<204-01>>

. INSTALL new rear suspension bushes and ball joints as required. For additional

information, refer to

<<204-02>>

.

G189234t12 : CHECK VEHICLE ALIGNMENT

1. Check the vehicle alignment. For additional information, refer to

<<502-00>>

.

•

Is the alignment within specification?

-> Yes

Vehicle is OK.

-> No

Adjust the alignment as necessary. For additional information, refer to

<<502-00>>

.

PINPOINT TEST G189234p4 : THE
PEDAL FEELS SPONGY

G189234t13 : CHECK FOR SPONGY PEDAL (ENGINE OFF)

1. Check for a firm brake pedal.

•

Is the brake pedal effort and brake pedal travel normal?

www.

-> Yes

Vehicle is OK.

-> No

GO to Pinpoint Test

G189234t14

.

G189234t14 : CHECK BRAKE PEDAL RESERVE (ENGINE OFF)

1. Pump the brake pedal 10 times and hold on the final application.

•

Does the brake pedal feel firm on final application?

-> Yes

GO to Pinpoint Test

G189234t15

.

-> No

BLEED the brake system. For additional information, refer to General Procedures. TEST the system

for normal operation.

G189234t15 : CHECK BRAKE PEDAL RESERVE (ENGINE ON)

1. Engine is idle. 2. Apply the brake pedal lightly three or four times. 3. Wait 15 seconds for the

vacuum to recover. 4. Push down on the brake pedal until it stops moving downward or an increased

resistance to the brake pedal travel occurs. 5. Hold the brake pedal in the applied position while

increasing the engine speed to 2000 revs/min. 6. Release the accelerator pedal.

•

Does the brake pedal move downward as the engine speed returns to idle?

-> Yes

GO to Pinpoint Test

G189234t16

.

-> No

CHECK the vacuum to brake booster. For additional information, refer to

<<206-07>>

.

G189234t16 : CHECK BRAKE FLUID LEVEL

1. Check the brake master cylinder reservoir fluid level.

•

Is the fluid level OK?

-> Yes

BLEED the brake system. For additional information, refer to General Procedures. TEST the system

for normal operation.

-> No

CHECK brake master cylinder reservoir sealing points. For additional information, refer to Brake

Master Cylinder in this section. ADD fluid and BLEED the brake system. For additional information,

refer to General Procedures. TEST the system for normal operation. REPEAT road test if necessary.

PINPOINT TEST G189234p5 : THE
PEDAL GOES DOWN FAST

G189234t17 : ROAD TEST VEHICLE

1. Road test and apply the brake pedal.

•

Is the brake pedal effort and brake pedal travel normal?

-> Yes

Vehicle is OK.

-> No

GO to Pinpoint Test

G189234t18

.

G189234t18 : CHECK BRAKE FLUID LEVEL

1. Check the brake master cylinder reservoir fluid level.

•

Is the fluid level within specification?

-> Yes

GO to Pinpoint Test

G189234t19

.

-> No

CHECK the brake master cylinder reservoir sealing points. For additional information, refer to Brake

Master Cylinder Component Test in this section. ADD fluid and BLEED brake system. For additional

information, refer to General Procedures. TEST the system for normal operation. REPEAT road test if

necessary.

G189234t19 : CHECK BRAKE PEDAL TRAVEL-PRESSURIZE SYSTEM

1. Pump the brake pedal rapidly (five times).

•

Does the brake pedal travel build up and then hold?

-> Yes

BLEED the brake system. Refer to the General Procedures. TEST the system for normal operation.

REPEAT road test. For additional information, refer to

<<206-06>>

-> No

GO to Pinpoint Test

G189234t20

.

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